VPN Throughput Calculator
Calculate effective VPN throughput after encryption and tunneling overhead. Compare AES-128, AES-256, and ChaCha20 with IPSec, WireGuard, and OpenVPN.
How to Use the VPN Throughput Calculator
- Enter your base connection bandwidth in Mbps.
- Select the encryption cipher.
- Select the tunnel protocol.
- Click Calculate to see effective throughput and overhead.
使用例
- •Sizing VPN gateways for enterprise deployments.
- •Comparing VPN protocols for performance vs security.
- •Planning bandwidth for remote workforce VPN access.
- •Evaluating hardware VPN appliances for throughput.
計算式
Effective throughput = Bandwidth × (1 − encryption overhead − tunnel overhead). Overhead varies by cipher and protocol.
よくある質問
Which VPN protocol has least overhead?
WireGuard has the lowest overhead (~3%) due to its lean codebase and modern cryptography. OpenVPN has the most (~8%).
Is AES-128 or AES-256 faster?
AES-128 is slightly faster. AES-256 adds about 4% overhead but provides higher security margin.
Why does VPN reduce throughput?
VPN adds encryption/decryption CPU overhead, encapsulation headers, and key exchange, all reducing effective bandwidth.